US3659435A - Torque transferring device - Google Patents

Torque transferring device Download PDF

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Publication number
US3659435A
US3659435A US35456A US3659435DA US3659435A US 3659435 A US3659435 A US 3659435A US 35456 A US35456 A US 35456A US 3659435D A US3659435D A US 3659435DA US 3659435 A US3659435 A US 3659435A
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US
United States
Prior art keywords
grooves
outer member
balls
recirculation
pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US35456A
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English (en)
Inventor
Sven Walter Nilsson
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SKF Industrial Trading and Development Co BV
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SKF Industrial Trading and Development Co BV
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Publication date
Application filed by SKF Industrial Trading and Development Co BV filed Critical SKF Industrial Trading and Development Co BV
Application granted granted Critical
Publication of US3659435A publication Critical patent/US3659435A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
    • F16D3/06—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
    • F16D3/065—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement by means of rolling elements

Definitions

  • a device for transferring a torque may comprise an outer tu- [301 Foreign Application P i rit Dgla bular component enclosing a shaft, the diameter of which is only slightly less than the cylindrical, internal surface of the May 9, 1969 Sweden ..6573/69 outer component These two components cooperate through the interrnediation of balls operatin in parallel, matchin s2 U.S. Cl. .64/23.7 g g [51] Int Cl M 3/06 groovesin the two components. [58] Field 0! Search...
  • the grooves are [56] References Cmd arranged in at least three pairs in which two grooves on op- UNITED STATES PATENTS posite sides of a ridge in the inner component will cooperate r with two grooves arranged at opposite sides of a groove in the et al outer member to form two runways are each con. 3 gf y a nected to a return passage in the outer component.
  • the present invention refers to a device adapted to transfer a torque between two components which are axially displaceable in relation to each other through the intermediation of balls operating in axially extending grooves in the components.
  • the aim of the invention is to provide a device which makes possible a re-circulation of the balls without any load being imposed thereon, and furthermore to arrange the runways for the balls with bends having appropriate radii to ensure a smooth running of the balls. By a slight increase of the ball diameter above the nominal value of the groove it will furthermore be possible to maintain the desired clearance within the unit.
  • one of the components which is tubular and encloses the other component, is inwardly defined by a substantially cylindrical surface, which the other component is defined by a substantially cylindrical external surface having slightly smaller diameter than the intemal surface of the outer component.
  • Each component is provided with at least three pairs of grooves running in parallel and having a cross section forming part of a circular arc.
  • Each pair of grooves in the internal component is located to fit in between the grooves at a juxtaposed pair of grooves in the outer component, in such a manner that the lines defining the cross sections of one groove in the outer member and one groove in the internal member will form part of a common circle, the outer member being provided with bores and passages to bring about a continuous re-circulation of the balls.
  • FIG. I shows a longitudinal section through the outer component taken along line 1-] in FIG. 2;
  • FIG. 2 is a cross section through the device taken along line II-II in FIG. 1;
  • FIG. 3 shows a cross section taken along line III-III in FIG.
  • FIG. 4 is a cross section taken along line IV-IV in FIG. 1;
  • FIG. 5 shows a perspective view of a guiding member.
  • the shaft is tubular and is generally denoted by 10. It has a general circular cross section, but in the body thereof four axially extending grooves 11 are formed spaced apart 90 by axially extending recesses 12 being milled from the body of the shaft.
  • the outer tubular component is denoted by 13 and has a considerably shorter length than the shaft.
  • the external surface of the outer component may have arbitrary shape, to make it suitable for fitting into a machine element. It is here shown cylindrical with two external recesses 14, which facilitate the desired connection to a certain type of machine elements.
  • the internal surface of the component is also cylindrical, and in the same four axially extending grooves 15 are formed, space apart by 90. These recesses are somewhat broader than the ridges 11 at the inner component, and it should be noted that the inner component is completely circumscribed by the outer component, in such a manner that a mechanical contact between the parts may be avoided.
  • the transfer of the torque is brought about by means of a number of balls 16 only, which are fitted into runways formed between the grooves in the components.
  • Said runways comprising parts at the ridges l1 and in the recesses 15.
  • the desired clearance between the components of the device may be maintained.
  • This adjustment of the clearance may also be brought about by dividing the outer component 13 into two or more parts, which may be adjusted in relation to each other. It is also possible to make axially extending slots in the component I3, and to force the parts separated by the slots towards each other by means of screws or the like in order to reduce the clearance.
  • a torque may thus be transferred between the two components by means of eight rows of balls, and during a relative axial displacement between the components it is necessary to provide a re-circulation of the balls from the rearmost end of the grooves to the forward ends, as counted, in the direction of movement. This re-circulation shall take place without the balls being subjected to any load during this part of the movement.
  • the balls must in other words have a possibility freely to pass through the body of one of the components.
  • FIG. 1 shows that the outer component 13, at each end is provided with a lid, 19 and 20, respectively. In these lids passages 22 are formed by means of guide members 21 being fitted into recesses.
  • Each passage in the lids is connected to a runway composed of two grooves 17 and 18 and this passage is continued by an axially extending return bore 23 in the outer component.
  • return bore 23 For each pair of runways l7, 18 there is such thus one return bore 23, and for the two runways, which are located to each side of a ridge 1], there will thus be two return bores 23.
  • These are in the manner best shown in FIG. 3 arranged in a plane 24, which forms a tangent to the circle defining the plane of division between the two components 10 and 13.
  • the cross sectional thickness of the outer member 13 may be maintained at a minimum and still provide a desired radius of the transfer passage 22 to permit smooth circulation of the balls.
  • the device of the present invention may be made more compactly as compared, for example, to devices wherein the ball return passage is located radially outwardly of the ball path between the members.
  • FIG. 5 shows a perspective view of a guiding member 21.
  • This consists of a head 25, which is formed as a half cylinder provided with an external groove 26 corresponding to the shape of the ball.
  • the member is provided with a shaft 27, which facilitates the mounting and locking thereof in the lid.
  • the drawings shows a device having four ridges.
  • three ridges must at least be provided, but depending upon the size of the device and the torque to be transferred, the number of ridges and runways may of course be increased above four.
  • each member is provided with at least three pairs of grooves running in parallel and having a cross section forming part of a circular arc, and where each pair of grooves in the inner member is located to fit in between the grooves at a juxtaposed pair in the outer member in such a manner that the lines defining the cross sections of one groove in the outer member and of one groove in the inner member will form part of a common circle defining a ball runway, said grooves of recirculation bores associated with the runways of each pair being disposed in a plane tangent to the annular space between the members.
  • a device as claimed in claim 1 including guide members forming the end passages of the recirculation bores, said guide members being fitted into recesses in lid parts at the outer axial ends of the outer member.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Rolling Contact Bearings (AREA)
  • Manipulator (AREA)
US35456A 1969-05-09 1970-05-07 Torque transferring device Expired - Lifetime US3659435A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE06573/69A SE341491B (ja) 1969-05-09 1969-05-09

Publications (1)

Publication Number Publication Date
US3659435A true US3659435A (en) 1972-05-02

Family

ID=20269043

Family Applications (1)

Application Number Title Priority Date Filing Date
US35456A Expired - Lifetime US3659435A (en) 1969-05-09 1970-05-07 Torque transferring device

Country Status (12)

Country Link
US (1) US3659435A (ja)
JP (1) JPS5035619B1 (ja)
AT (1) AT304964B (ja)
CH (1) CH505995A (ja)
CS (1) CS161991B2 (ja)
DE (1) DE2022414B2 (ja)
ES (1) ES379317A1 (ja)
FR (1) FR2047480A5 (ja)
GB (1) GB1277344A (ja)
NL (1) NL7006730A (ja)
SE (1) SE341491B (ja)
YU (1) YU33131B (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127309A (en) * 1976-08-18 1978-11-28 Hiroshi Teramachi Unlimited sliding ball spline assembly
US4634296A (en) * 1985-05-20 1987-01-06 Nippon Thompson Co., Ltd. Ball spline bearing
DE3639544A1 (de) * 1986-04-05 1987-10-15 Nippon Thompson Co Ltd Keilnuten-kugellager mit umlaufenden kugeln
US5427019A (en) * 1991-10-07 1995-06-27 Georgia-Pacific Corporation Sheet material pallet with wrap around deck
US20100098358A1 (en) * 2006-11-30 2010-04-22 Thk Co., Ltd. Ball spline device
US20130081918A1 (en) * 2011-10-03 2013-04-04 GM Global Technology Operations LLC Pump drive launch device actuator

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597518A (en) * 1979-01-20 1980-07-24 Hiroshi Teramachi Endless sliding ball spline bearing
JPS59140920A (ja) * 1983-01-29 1984-08-13 Hiroshi Teramachi ボ−ルスプライン軸受
JPS59155617A (ja) * 1983-02-21 1984-09-04 Tsubakimoto Seikou:Kk ボ−ルスプライン
DE102006030105A1 (de) * 2006-06-28 2008-01-03 Voith Turbo Gmbh & Co. Kg Längenvariable Welle
JP2011085247A (ja) * 2009-10-19 2011-04-28 Thk Co Ltd 運動案内装置
DE202011106188U1 (de) * 2011-09-30 2013-01-09 Fritz Driescher KG Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co Schalterpoleinheit
JP5646519B2 (ja) * 2012-01-13 2014-12-24 Thk株式会社 運動案内装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US851728A (en) * 1906-09-29 1907-04-30 Henry & Wright Mfg Company Spindle-drive.
US2945366A (en) * 1958-10-06 1960-07-19 Beaver Prec Products Inc Ball spline assembly
US3045457A (en) * 1960-01-20 1962-07-24 Beaver Prec Products Inc Ball spline assembly
GB955913A (en) * 1962-07-16 1964-04-22 Prec Gear Machines And Tools L Ball spline assembly
US3304745A (en) * 1965-04-29 1967-02-21 Gen Motors Corp Ball spline assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US851728A (en) * 1906-09-29 1907-04-30 Henry & Wright Mfg Company Spindle-drive.
US2945366A (en) * 1958-10-06 1960-07-19 Beaver Prec Products Inc Ball spline assembly
US3045457A (en) * 1960-01-20 1962-07-24 Beaver Prec Products Inc Ball spline assembly
GB955913A (en) * 1962-07-16 1964-04-22 Prec Gear Machines And Tools L Ball spline assembly
US3304745A (en) * 1965-04-29 1967-02-21 Gen Motors Corp Ball spline assembly

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127309A (en) * 1976-08-18 1978-11-28 Hiroshi Teramachi Unlimited sliding ball spline assembly
US4634296A (en) * 1985-05-20 1987-01-06 Nippon Thompson Co., Ltd. Ball spline bearing
DE3639544A1 (de) * 1986-04-05 1987-10-15 Nippon Thompson Co Ltd Keilnuten-kugellager mit umlaufenden kugeln
US5427019A (en) * 1991-10-07 1995-06-27 Georgia-Pacific Corporation Sheet material pallet with wrap around deck
US20100098358A1 (en) * 2006-11-30 2010-04-22 Thk Co., Ltd. Ball spline device
US8123407B2 (en) * 2006-11-30 2012-02-28 Thk Co., Ltd. Ball spline device
US20130081918A1 (en) * 2011-10-03 2013-04-04 GM Global Technology Operations LLC Pump drive launch device actuator
US9194444B2 (en) * 2011-10-03 2015-11-24 GM Global Technology Operations LLC Pump drive launch device actuator

Also Published As

Publication number Publication date
CH505995A (de) 1971-04-15
ES379317A1 (es) 1972-10-16
YU116970A (en) 1975-10-31
AT304964B (de) 1973-02-12
SE341491B (ja) 1971-12-27
GB1277344A (en) 1972-06-14
CS161991B2 (ja) 1975-06-10
JPS5035619B1 (ja) 1975-11-18
YU33131B (en) 1976-04-30
DE2022414B2 (de) 1972-05-18
DE2022414A1 (de) 1970-11-19
FR2047480A5 (ja) 1971-03-12
NL7006730A (ja) 1970-11-11

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